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The isotope 22Na has a half-life of 2.60 years. How much of a 1.00 gram sample would be left after 1.00 yr?
Use this information to compare how long it will take to obtain molecular scale mixing of such a gas over i) distance 1*10^-4 m and ii) 10m
determine how many grams of solute would separate if the quantity of the solvent is 129 grams if a saturated solution
You have prepared a saturated solution of X at 20C using 27.0 g of water. How much solute can be dissolved if the temperature is increased to 30 C?
A deep-sea diver uses a gas cylinder with a volume of 10.0 {\rm L} and a content of 51.8g of {\rm O}_{2} and 33.6g of {\rm He}. Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 20^\circ C.
what is the percent by mass of nahco3 in a solution containing 30 g of nahco3 dissolved in 500 ml of
Calculate the pH of the solution that contains following compounds. Some relevant Ka values are Ka(CH3COOH)=1.7 X 10 ^-5, Ka(HNO2)=7.2X 10^-4, and Ka(NH4+) = 5.6 x 10^-10.
Consider the following balanced chemical reaction: 2Al + 3H2SO4--->Al2(SO4)3 + 3H2 a) How many grams of Al2(S04)3 can be produced from the reaction between 11.38 grams of Al and 49.91 grams of H2SO4
At 25 degrees celsius and 750 mm Hg, 1.05 g of this gas occupies a volume of 0.500 L. What is the molecular formula of the gas?
What combination is the best choice for the preparation of 3-chloro-1-iodobutane? Answer a.) 1-Iodobutane + chlorine (400 °C) b.) 2-Chlorobutane + iodine
The Kp for the reaction is 4.3X10^-4 at 648K. Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900atm N2 and 0.500 atm H2 at 648K.
The annual production of zinc sulfide (ZnS) is 4.5 104 tons. Estimate the number of tons of SO2 produced by roasting it to extract zinc metal
At what wavenumber would you expect to see an absorbance in the IR if your sample contained water as an impurity?
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